Oil and Gas Properties and Equipment, net (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($) a Well	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) a Well	Dec. 31, 2014 USD ($)
Impairment of Oil and Gas Properties	$ 37,646,000	$ 81,240,000	$ 45,938,000	$ 7,000	$ 30,591,000	$ 735,000	$ 584,000	$ 755,000	$ 164,831,000	$ 32,665,000
Impairment of Leasehold									57,691,000	17,130,000
Impairment of Oil and Gas Properties									107,140,000	$ 15,535,000
Loss on Disposition of Proved Property									706,000
Proceeds from Sale of Oil and Gas Property and Equipment									$ 17,800,000
Transaction [Domain]
Gas and Oil Area, Undeveloped, Net | a	109,000								109,000
Productive Oil Wells, Number of Wells, Gross | Well	39								39
Productive Oil Wells, Number of Wells, Net | Well	7								7